Method for sealing drilled hole for mine gas drainage

Disclosed is a method for sealing a drilled hole for mine gas drainage. Apparatuses used by the method include a drill bit, a drill rod and a casing, and a blocking material is a Marithan mixture. The method includes: tapping with the drill bit and the drill rod, and withdrawing the drill rod and the drill bit when tapping depth reaches to 5-10m; connecting the casing with a joint, before inserting the casing into the drilled hole, winding a hemp rope, with the length about one third of one casing joint, on the last casing joint, and closely connecting the casting with the drilled hole; binding a Marithan bag and adhesive tape for the casing, quickly and evenly kneading substances in the Marithan bag with hands before pushing, and then manually pushing the substances in the Marithan bag into the casing; exposing the last casing joint by 300mm for the convenience of connection of a hose, and sealing all empty openings before drilled hole drainage to prevent gas from leaking. The drilled hole is quickly sealed